I am not sure about that one, there is a lot of damage and MD going on with the date also. Have you referenced the die markers?
CopperCoins and Variety Vista call out the close proximity to the 5 and I pull up another pic of the east edge. http://varietyvista.com/02a LC RPMs Vol 1/1951SRPM007.htm
Die markers are your best friend in this case. I am not did agreeing with you but the condition of the coin, is the question.